Submersible type reverse circulation drilling machine power head

Abstract

The utility model discloses a submersible type reverse circulation drilling machine power head which comprises a speed reducer, a gear box body, a flower part transmission shaft and a transmission hub, a slewing bearing is installed outside the transmission hub in a sleeved mode, the gear box body is arranged in the axial direction of the slewing bearing, and the slewing bearing is driven by the gear box body to drive the transmission hub. The speed reducer is arranged on the upper portion of the gearbox body, the speed reducer and the gearbox body are in transmission installation through a flower piece transmission shaft, the drill bit is installed at the bottom of the transmission hub through a flange, and the upper portion of the transmission hub is connected with the submersible pump assembly through a flange. The problem of labor consumption of a reverse circulation drilling machine is solved, the submersible type working principle is that a sliding rod stretches out and draws back, a rotary drilling drill floating source is combined for work, a submersible slurry pump is used for deslagging while drilling is conducted, actions such as drilling, soil lifting and soil pouring of the rotary drilling drill do not need to be repeated, and operations such as rod disassembling, rod adding and vacuumizing of the reverse circulation drilling machine do not need to be repeated. The labor, the manufacturing cost and the energy consumption are greatly reduced. And the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of submersible drilling rig power heads, in particular to a submersible reverse circulation drilling rig power head. Background Art

[0002] Submersible reverse circulation machines are primarily suitable for pile foundation projects. The main working principle of the power head is to use a direct-drive drill bit, with the upper end connected to a slide bar that slides up and down for stability. The power source can be driven electrically or hydraulically, with the gearbox driven by a reducer. A submersible mud pump is also added, and the output torque can be adjusted by a frequency converter according to geological conditions.

[0003] Improvements have been made to the construction methods and energy consumption of the two existing rotary drilling rigs and reverse circulation drilling rigs on the market. During the construction process, the rotary drilling rig is more efficient than the reverse circulation drilling rig, and one operator can complete the construction work. However, at the same time, the construction cost and energy consumption increase exponentially, and the drilling depth is limited by the power of the machine. Repeated drilling, lifting soil, and dumping soil are required during the construction process.

[0004] The output power of reverse circulation drilling rig is smaller than that of rotary drilling rig, the drilling depth is not restricted, the construction cost is low, and there is no need to lift or dump soil, etc. However, the labor consumption during construction is too high, the workload is heavy, and the construction efficiency is low. Three to four people are required to operate one device during work, and operations such as removing rods, installing rods, and vacuuming need to be repeated, which is time-consuming and labor-intensive, and the efficiency is far lower than that of rotary drilling rig.

[0005] For this purpose, a submersible reverse circulation drilling rig power head is required. Utility Model Content

[0006] In view of the problems existing in the above-mentioned prior art, the present invention provides a submersible reverse circulation drilling rig power head, the purpose of which is to solve the above-mentioned technical problems.

[0007] In order to achieve the above-mentioned purpose, the utility model is implemented through the following technical solutions: a submersible reverse circulation drilling rig power head, the drilling rig power head includes a reducer, a gear box, a flower piece transmission shaft, and a transmission hub. The outer sleeve of the transmission hub is installed with a slewing bearing, and the gear box is provided axially with the slewing bearing to drive the transmission hub through the gear box. The reducer is arranged on the upper part of the gear box, and the reducer and the gear box are installed through the flower piece transmission shaft. The flower piece transmission shaft is meshed with the slewing bearing shaft. The bottom of the transmission hub is installed with a drill bit through a flange, and the upper part of the transmission hub is connected to the submersible pump assembly through a flange.

[0008] Preferably, the upper portion of the driving hub is sealed with the slewing bearing via an oil seal, and an upper sealing member is installed outside the oil seal.

[0009] Preferably, the lower part of the transmission hub is mounted inside the drilling rig power head via a bearing, and a lower seal is provided between the transmission hub and the bearing.

[0010] Preferably, at least two gear housings are distributed axially on the slewing bearing.

[0011] Preferably, the transmission hub is fixedly mounted on the slewing bearing by providing a fixing plate.

[0012] Preferably, the surface of the transmission hub located at the lower part of the fixed plate is arranged as shaft layer one and shaft layer two from top to bottom, the top end face of shaft layer one is sealed against the bottom of the slewing support, the shaft layer two is installed with an interference fit with the bearing, and a lower seal is provided between the transmission hub located at the bottom of shaft layer two and the bearing.

[0013] Preferably, a refueling port is provided on the top of the drilling rig power head and an oil drain port is provided on the bottom.

[0014] In summary, the present invention provides a submersible reverse circulation drilling rig power head, which is somewhere in between the two products. It can solve the high cost and high energy consumption of rotary drilling, and also solve the labor consumption problem of reverse circulation drilling rigs. The submersible working principle is the extension and contraction of the sliding rod, combined with the floating source operation of the rotary drilling rig. The submersible mud pump is used to discharge slag during drilling, eliminating the need to repeat the drilling, lifting and dumping operations of the rotary drilling rig, and the need to repeat the operations of the reverse circulation drilling rig such as removing and installing rods and vacuuming. This greatly reduces labor, construction costs, and energy consumption, and increases work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic structural diagram of the power head of a submersible reverse circulation drilling rig of the present invention;

[0016] Figure 2 This is a schematic diagram of the transmission structure of the flower piece transmission shaft and transmission hub of the utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the transmission shaft of the flower piece of the utility model;

[0018] Figure 4 This is a schematic diagram of the overhead structure of the power head of the submersible reverse circulation drilling rig of the present invention;

[0019] In the figure: reducer 1, gear box body 2, flower piece transmission shaft 3, transmission hub 4, slewing bearing 5, oil seal 6, upper seal 7, lower seal 11, shaft layer 12, shaft layer 2 13, drill bit 14, bearing 15, fixed plate 16. DETAILED DESCRIPTION

[0020] The present invention will be further described below with reference to the accompanying drawings.

[0021] like Figures 1 to 4 As shown:

[0022] In order to solve the technical problems existing in the existing technology: the construction cost and energy consumption have increased exponentially, the drilling depth is limited by the power of the machine model, and the construction process requires repeated drilling, lifting soil, dumping soil and other actions. A submersible power head is designed. The reducer gear material is 20CrMnTi, the installation box is 355B, the submersible mud pump has a head of 80 meters, and the deep well motor is used to drive the deceleration device, thereby achieving the underwater working principle. The slide rod slides up and down, saving the processes of lifting soil, dumping soil, disassembly, installation, and pumping, thereby saving cost, energy consumption, and labor intensity.

[0023] The specific technical implementation is: a submersible reverse circulation drilling rig power head, the drilling rig power head includes a reducer 1, a gear box 2, a flower piece transmission shaft 3, and a transmission hub 4. The external sleeve of the transmission hub 4 is installed with a slewing bearing 5, and the axial direction of the slewing bearing 5 is provided with a gear box 2 to drive the slewing bearing 5 through the gear box 2 to drive the transmission hub 4. The reducer 1 is arranged on the upper part of the gear box 2, and the reducer 1 and the gear box 2 are installed through the flower piece transmission shaft 3. The flower piece transmission shaft 3 is installed in gear with the slewing bearing 5. The bottom of the transmission hub 4 is installed with a drill bit 14 through a flange, and the upper part of the transmission hub 4 is connected to the submersible pump assembly through a flange.

[0024] The operation mode is as follows: the axial distribution of the drilling rig power head is a gear box 2. In this embodiment, two gear boxes 2 are used to transmit the slewing bearing 5 to realize the drive of the transmission hub 4 and drive the drill bit to drill holes; the upper part of the gear box 2 is provided with a power source reducer 1, and the reducer 1 and the gear box 2 are installed through a flower piece transmission shaft 3. The flower piece transmission shaft 3 and the bottom of the gear box 2 are installed through a bearing 15. The gear box 2 is meshed with the slewing bearing 5. An oil seal 6 is provided between the upper part of the slewing bearing 5 and the transmission hub 4 to perform a sealing installation on the slewing bearing 5. The oil seal 6 is further sealed with an upper seal 7 to realize the sealed transmission of the transmission hub 4, thereby improving the transmission operation efficiency;

[0025] In at least one embodiment, the lower portion of the transmission hub 4 is mounted inside the drilling rig power head via a bearing 15 , and a lower seal 11 is provided between the transmission hub 4 and the bearing 15 .

[0026] In at least one embodiment, at least two gear boxes 2 are distributed axially along the slewing bearing 5. In this embodiment, two gear boxes 2 are preferably used. The flower piece transmission shaft 3 inside the gear box 2 is driven by the reducer 1. One side of the flower piece transmission shaft 3 is engaged with the slewing bearing 5 to install the slewing bearing, thereby driving the transmission hub 4 to drive the drill bit 14 to drill holes. During the drilling process, the slag discharge operation is performed by the submersible pump assembly provided on the upper part of the transmission hub 4. There is no need to repeat the actions of rotary drilling, lifting soil, and dumping soil, thereby improving the utilization efficiency of the drilling rig.

[0027] In at least one embodiment, in order to improve the secure installation and sealing of the transmission hub 4 and the slewing bearing 5, the transmission hub 4 is fixedly mounted on the slewing bearing 5 by providing a fixing plate 16, and the fixing plate 16 is fixedly mounted on the upper part of the slewing bearing 5, thereby achieving secure installation of the transmission hub 4 and the slewing bearing 5.

[0028] At least in one embodiment, in order to achieve stable installation of the transmission hub 4 on the drilling rig power head, the structure is adopted as follows: the surface of the transmission hub 4 located at the lower part of the fixed plate 16 is arranged as shaft layer 12 and shaft layer 2 13 from top to bottom. The transmission hub 4 can achieve distributed installation of the transmission hub 4 and the drilling rig power head through the arrangement of shaft layer 12 and shaft layer 2 13. Specifically, the fixed plate 16 and the slewing support 5 are fixedly installed so that the top end face of the shaft layer 12 is abutted and sealed against the bottom of the slewing support 5, the shaft layer 2 13 is installed with an interference fit with the bearing 15, and a lower seal 11 is provided between the transmission hub 4 located at the bottom of the shaft layer 2 13 and the bearing 15, thereby achieving stable installation of the transmission hub 4 on the drilling rig power head and better sealing, which is beneficial for diving excavation operations.

[0029] In at least one embodiment, a refueling port is provided on the top of the drilling rig power head and an oil drain port is provided on the bottom.

[0030] The embodiments of the present invention are only used to illustrate the present invention and do not limit the scope of the claims. Other substantially equivalent alternatives that can be thought of by those skilled in the art are all within the protection scope of the present invention.

Claims

1. Submersible reverse circulation drilling rig power head, characterized by: The drilling rig power head comprises a reducer (1), a gear box (2), a flower piece transmission shaft (3), and a transmission hub (4). The outer sleeve of the transmission hub (4) is provided with a slewing bearing (5). The axial direction of the slewing bearing (5) is provided with a gear box (2) so as to drive the transmission hub (4) through the gear box (2). The reducer (1) is provided on the upper part of the gear box (2). The reducer (1) and the gear box (2) are installed through the flower piece transmission shaft (3). The flower piece transmission shaft (3) and the slewing bearing (5) are installed in meshing engagement. A drill bit (14) is installed on the bottom of the transmission hub (4) through a flange. The upper part of the transmission hub (4) is connected to the submersible pump assembly through a flange.

2. The submersible reverse circulation drilling rig power head according to claim 1, characterized in that: The upper portion of the driving hub (4) is sealed and mounted to the slewing bearing (5) via an oil seal (6), and an upper seal (7) is mounted on the outside of the oil seal (6).

3. The submersible reverse circulation drilling rig power head according to claim 2, characterized in that: The lower part of the transmission hub (4) is mounted inside the drilling rig power head via a bearing (15), and a lower sealing member (11) is provided between the transmission hub (4) and the bearing (15).

4. The submersible reverse circulation drilling rig power head according to claim 1, characterized in that: The slewing bearing (5) is axially distributed over at least two gear housings (2).

5. The submersible reverse circulation drilling rig power head according to claim 3, characterized in that: The driving hub (4) is fixedly mounted on the slewing bearing (5) by providing a fixing plate (16).

6. The submersible reverse circulation drilling rig power head according to claim 5, characterized in that: The surface of the transmission hub (4) located at the lower part of the fixed plate (16) is sequentially arranged as shaft layer one (12) and shaft layer two (13) from top to bottom. The top end face of the shaft layer one (12) is sealed against the bottom of the slewing support (5). The shaft layer two (13) is installed with an interference fit with the bearing (15). A lower seal (11) is provided between the transmission hub (4) located at the bottom of the shaft layer two (13) and the bearing (15).

7. The submersible reverse circulation drilling rig power head according to claim 1, characterized in that: The top of the drilling rig power head is provided with a refueling port and the bottom is provided with an oil drain port.

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